The big dog weighs 5 times as much as the little dog. The little dog weighs 2 3 as much as the medium-sized dog. The medium-sized dog weighs 12 pounds more than the little dog. How much (in pounds) does the big dog weigh

The answer to your question is the big dog weighs 120 pounds

Step-by-step explanation:

Data

big dog = b

medium dog = m

small dog = s

Equations

b = 5s

m = 12 + s

s = 2/3 m

Process

1. - Substitute m in the last equation

s = 2/3 (12 + s)

s = 24/3 + 2/3s

s - 2/3s = 8

1/3 s = 8

s = 8 (3)

s = 24 pounds

2. - Substitute s in the first equation

b = 5 (24)

b = 120 pounds